package cn.demo.sys.service.impl;

import cn.demo.common.annotation.DataScope;
import cn.demo.common.constant.CommonConstants;
import cn.demo.common.constant.UserConstants;
import cn.demo.common.core.domain.TreeSelect;
import cn.demo.common.core.domain.entity.SysDept;
import cn.demo.common.core.domain.entity.SysRole;
import cn.demo.common.core.domain.entity.SysUser;
import cn.demo.common.core.page.PageQuery;
import cn.demo.common.core.text.Convert;
import cn.demo.common.exception.ServiceException;
import cn.demo.common.utils.*;
import cn.demo.common.utils.spring.SpringUtils;
import cn.demo.sys.mapper.SysDeptMapper;
import cn.demo.sys.mapper.SysRoleMapper;
import cn.demo.sys.service.ISysDeptService;
import com.mybatisflex.core.paginate.Page;
import com.mybatisflex.core.query.QueryWrapper;
import com.mybatisflex.spring.service.impl.ServiceImpl;
import jakarta.annotation.Resource;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

import java.util.*;

/**
 * 部门管理 服务实现
 *
 * @author ruoyi
 */
@Service
@CacheConfig(cacheNames = "SysDept", keyGenerator = "myKeyGenerator")
public class SysDeptServiceImpl extends ServiceImpl<SysDeptMapper,SysDept> implements ISysDeptService {
    @Resource
    private SysDeptMapper deptMapper;

    @Resource
    private SysRoleMapper roleMapper;

    /**
     * 查询部门管理数据
     *
     * @param dept 部门信息
     * @return 部门信息集合
     */
    @Override
    @DataScope
    public Page<SysDept> selectDeptPage(SysDept dept, PageQuery pageQuery) {
        return deptMapper.paginate(pageQuery.build(), QueryWrapper.create(dept, SysDept.operators));
    }

    @Override
    @DataScope
    public List<SysDept> selectDeptList(SysDept dept) {
        return deptMapper.selectListByQuery(QueryWrapper.create(dept, SysDept.operators));
    }



    /**
     * 查询部门树结构信息
     *
     * @param dept 部门信息
     * @return 部门树信息集合
     */
    @Override
    public List<TreeSelect> selectDeptTreeList(SysDept dept) {
        List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
        return buildDeptTreeSelect(depts);
    }

    /**
     * 构建前端所需要树结构
     *
     * @param depts 部门列表
     * @return 树结构列表
     */
    @Override
    public List<SysDept> buildDeptTree(List<SysDept> depts) {
        List<SysDept> returnList = new ArrayList<SysDept>();
        List<String> tempList = depts.stream().map(SysDept::getDeptId).toList();
        for (SysDept dept : depts) {
            // 如果是顶级节点, 遍历该父节点的所有子节点
            if (!tempList.contains(dept.getParentId())) {
                recursionFn(depts, dept);
                returnList.add(dept);
            }
        }
        if (returnList.isEmpty()) {
            returnList = depts;
        }
        return returnList;
    }

    /**
     * 构建前端所需要下拉树结构
     *
     * @param depts 部门列表
     * @return 下拉树结构列表
     */
    @Override
    public List<TreeSelect> buildDeptTreeSelect(List<SysDept> depts) {
        List<SysDept> deptTrees = buildDeptTree(depts);
        return deptTrees.stream().map(TreeSelect::new).toList();
    }

    /**
     * 根据角色ID查询部门树信息
     *
     * @param roleId 角色ID
     * @return 选中部门列表
     */
    @Override
    @Cacheable(unless="#result == null")
    public List<Long> selectDeptListByRoleId(String roleId) {
        SysRole role = roleMapper.selectOneById(roleId);
        return deptMapper.selectDeptListByRoleId(roleId, role.getDeptCheckStrictly());
    }

    /**
     * 根据部门ID查询信息
     *
     * @param deptId 部门ID
     * @return 部门信息
     */
    @Override
    @Cacheable(unless="#result == null")
    public SysDept selectDeptById(String deptId) {
        return deptMapper.selectOneById(deptId);
    }

    /**
     * 根据ID查询所有子部门（正常状态）
     *
     * @param deptId 部门ID
     * @return 子部门数
     */
    @Override
    @Cacheable(unless="#result == null")
    public int selectNormalChildrenDeptById(String deptId) {
        return deptMapper.selectNormalChildrenDeptById(deptId);
    }

    /**
     * 是否存在子节点
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public boolean hasChildByDeptId(String deptId) {
        int result = deptMapper.hasChildByDeptId(deptId);
        return result > 0;
    }

    /**
     * 查询部门是否存在用户
     *
     * @param deptId 部门ID
     * @return 结果 true 存在 false 不存在
     */
    @Override
    public boolean checkDeptExistUser(String deptId) {
        int result = deptMapper.checkDeptExistUser(deptId);
        return result > 0;
    }

    /**
     * 校验部门名称是否唯一
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public boolean checkDeptNameUnique(SysDept dept) {
        SysDept info = deptMapper.checkDeptNameUnique(dept.getDeptName(), dept.getParentId());
        return checkUnique(dept, info);

    }

    private static boolean checkUnique(SysDept dept, SysDept info) {
        if (ObjUtils.isNotNull(info) && !info.getDeptId().equals(dept.getDeptId())) {
            return UserConstants.NOT_UNIQUE;
        }
        return UserConstants.UNIQUE;
    }


    /**
     * 校验部门是否有数据权限
     *
     * @param deptId 部门id
     */
    @Override
    public void checkDeptDataScope(String deptId) {
        if (!SysUser.isAdmin(SecurityUtils.getUserId())) {
            SysDept dept = new SysDept();
            dept.setDeptId(deptId);
            List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
            if (ObjUtils.isEmpty(depts)) {
                throw new ServiceException("没有权限访问部门数据！");
            }
        }
    }

    /**
     * 新增保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    @CacheEvict(allEntries = true)
    public int insertDept(SysDept dept) {
        SysDept info = deptMapper.selectOneById(dept.getParentId());
        // 如果父节点不为正常状态,则不允许新增子节点
        if (CommonConstants.DISABLED.equals(info.getStatus())) {
            throw new ServiceException("部门停用，不允许新增");
        }
        dept.setAncestors(info.getAncestors() + "," + dept.getParentId());
        return deptMapper.insert(dept);
    }

    /**
     * 修改保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    @CacheEvict(allEntries = true)
    public int updateDept(SysDept dept) {
        SysDept newParentDept = deptMapper.selectOneById(dept.getParentId());
        SysDept oldDept = deptMapper.selectOneById(dept.getDeptId());
        if (ObjUtils.isNotNull(newParentDept) && ObjUtils.isNotNull(oldDept)) {
            String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getDeptId();
            String oldAncestors = oldDept.getAncestors();
            dept.setAncestors(newAncestors);
            updateDeptChildren(dept.getDeptId(), newAncestors, oldAncestors);
        }
        int result = deptMapper.update(dept);
        if (CommonConstants.NORMAL.equals(dept.getStatus()) && StringUtils.isNotEmpty(dept.getAncestors())
                && !StringUtils.equals("0", dept.getAncestors())) {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatusNormal(dept);
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     *
     * @param dept 当前部门
     */
    private void updateParentDeptStatusNormal(SysDept dept) {
        String ancestors = dept.getAncestors();
        String[] deptIds = Convert.toStrArray(ancestors);
        deptMapper.updateDeptStatusNormal(deptIds);
    }

    /**
     * 修改子元素关系
     *
     * @param deptId       被修改的部门ID
     * @param newAncestors 新的父ID集合
     * @param oldAncestors 旧的父ID集合
     */
    public void updateDeptChildren(String deptId, String newAncestors, String oldAncestors) {
        List<SysDept> children = deptMapper.selectChildrenDeptById(deptId);
        for (SysDept child : children) {
            child.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
        }
        if (children.size() > 0) {
            deptMapper.updateDeptChildren(children);
        }
    }

    /**
     * 删除部门管理信息
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    @CacheEvict(allEntries = true)
    public int deleteDeptById(String deptId) {
        return deptMapper.deleteById(deptId);
    }

    @Override
    @Cacheable(unless="#result == null")
    public Set<String> getDeptAndChild(String deptId) {
        Set<String> ids = new HashSet<>();
        ids.add(deptId);
        List<SysDept> deptList = deptMapper.selectChildrenDeptById(deptId);
        if (!CollectionUtils.isEmpty(deptList)) {
            ids.addAll(StreamUtils.toList(deptList, SysDept::getDeptId));
            for (SysDept dept : deptList) {
                Set<String> child = getDeptAndChild(dept.getDeptId());
                if (null != child && child.size() > 0) {
                    ids.addAll(child);
                }
            }
        }
        return ids;
    }

    /**
     * 获取上级部门名称
     *
     * @param deptId 部门id
     * @return
     */
    @Override
    @Cacheable(unless="#result == null")
    public String getDeptParentName(String deptId) {
        SysDept sysDept = this.selectDeptById(deptId);
        if (null != sysDept) {
            StringBuilder parentName = new StringBuilder();
            for (String pid : sysDept.getAncestors().split(StringUtils.DELIMITER)) {
                if (!CommonConstants.ZERO_STR.equals(pid)) {
                    SysDept pDept = this.selectDeptById(pid);
                    if (null != pDept){
                        parentName.append(pDept.getDeptName());
                    }
                }
            }
            return parentName.toString();
        }
        return null;
    }


    /**
     * 递归列表
     */
    private void recursionFn(List<SysDept> list, SysDept t) {
        // 得到子节点列表
        List<SysDept> childList = getChildList(list, t);
        t.setChildren(childList);
        for (SysDept tChild : childList) {
            if (hasChild(list, tChild)) {
                recursionFn(list, tChild);
            }
        }
    }

    /**
     * 得到子节点列表
     */
    private List<SysDept> getChildList(List<SysDept> list, SysDept t) {
        List<SysDept> tlist = new ArrayList<SysDept>();
        for (SysDept n : list) {
            if (ObjUtils.isNotNull(n.getParentId()) && n.getParentId().equals(t.getDeptId())) {
                tlist.add(n);
            }
        }
        return tlist;
    }

    /**
     * 判断是否有子节点
     */
    private boolean hasChild(List<SysDept> list, SysDept t) {
        return getChildList(list, t).size() > 0;
    }

}
